3 files changed, 20 insertions, 6 deletions

diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index b0fce1387ea..5827324e9d9 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -92,6 +92,7 @@
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 
 #undef COSA_SLOW_IO	/* for testing purposes only */
 
@@ -970,15 +971,21 @@ static int cosa_open(struct inode *inode, struct file *file)
 	struct channel_data *chan;
 	unsigned long flags;
 	int n;
+	int ret = 0;
 
+	lock_kernel();
 	if ((n=iminor(file->f_path.dentry->d_inode)>>CARD_MINOR_BITS)
-		>= nr_cards)
-		return -ENODEV;
+		>= nr_cards) {
+		ret = -ENODEV;
+		goto out;
+	}
 	cosa = cosa_cards+n;
 
 	if ((n=iminor(file->f_path.dentry->d_inode)
-		& ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels)
-		return -ENODEV;
+		& ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) {
+		ret = -ENODEV;
+		goto out;
+	}
 	chan = cosa->chan + n;
 	
 	file->private_data = chan;
@@ -987,7 +994,8 @@ static int cosa_open(struct inode *inode, struct file *file)
 
 	if (chan->usage < 0) { /* in netdev mode */
 		spin_unlock_irqrestore(&cosa->lock, flags);
-		return -EBUSY;
+		ret = -EBUSY;
+		goto out;
 	}
 	cosa->usage++;
 	chan->usage++;
@@ -996,7 +1004,9 @@ static int cosa_open(struct inode *inode, struct file *file)
 	chan->setup_rx = chrdev_setup_rx;
 	chan->rx_done = chrdev_rx_done;
 	spin_unlock_irqrestore(&cosa->lock, flags);
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int cosa_release(struct inode *inode, struct file *file)
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
index 520bb0b1a9a..6d35155c714 100644
--- a/drivers/net/wan/hdlc_fr.c
+++ b/drivers/net/wan/hdlc_fr.c
@@ -1008,6 +1008,7 @@ static int fr_rx(struct sk_buff *skb)
 		stats->rx_bytes += skb->len;
 		if (pvc->state.becn)
 			stats->rx_compressed++;
+		skb->dev = dev;
 		netif_rx(skb);
 		return NET_RX_SUCCESS;
 	} else {
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index 249e18053d5..069f8bb0a99 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -32,6 +32,7 @@
 #include <linux/x25.h>
 #include <linux/lapb.h>
 #include <linux/init.h>
+#include <linux/rtnetlink.h>
 #include "x25_asy.h"
 
 #include <net/x25device.h>
@@ -601,8 +602,10 @@ static void x25_asy_close_tty(struct tty_struct *tty)
 	if (!sl || sl->magic != X25_ASY_MAGIC)
 		return;
 
+	rtnl_lock();
 	if (sl->dev->flags & IFF_UP)
 		dev_close(sl->dev);
+	rtnl_unlock();
 
 	tty->disc_data = NULL;
 	sl->tty = NULL;